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Ethylene production by cress roots and excised cress root segments and its inhibition by 3,5-diiodo-4-hydroxybenzoic acid

✍ Scribed by M. L. Robert; H. F. Taylor; R. L. Wain

Publisher: Springer-Verlag
Year: 1975
Tongue: English
Weight: 692 KB
Volume: 126
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00388969

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✦ Synopsis

Diiodo-4-hydroxybenzoic acid (DIHB) has been shown to exert an inhibitory effect on the formation of ethylene by the roots of intact cress Lepidium sativum seedlings in light, and by excised cress root segments. Adding IAA to the culture solution greatly promoted ethylene production, which was suppressed by DIHB. The findings together with results obtaLaed with dinitrophenol (D~qP), L-methionine and L-ethionine and also the horseradish peroxidase/methional system of Yang are discussed.

The results indicate that the effect of DIttB in promoting the root growth of cress seedlings in nutrient solution in the light operates, at least in part, by suppressing the formation of the root growth inhibitor ethylene.

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